Diamond or gemstone



FIG. 1 is a bottom planar view of a diamond or a gemstone showing my new design;

FIG. 2 is a side planar view thereof;

FIG. 3 is a top planar view thereof;

FIG. 4 is a perspective view thereof with the bottom part in front; and,

FIG. 5 is a perspective view thereof with the top part in front. 

The ornamental design for a diamond or gemstone, as shown. 